I'm glad you spotted that in the photos, Glenn.
The first view seems to confirm my interpretation, that there is a triangle-section joiner-piece between the splayed upper leg bents. As I said in an earlier post, this part ensures the leg assembly stays locked in place and does not splay. See the pic, attached, in which I moved the part out a ways so it's shape is evident.
Your arrow in the second pic points out the stretcher.